Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 688
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E. WALKER. PHONOGRAPH. APPLICATION FILED SEPT.25, 1907. RENEWED MAR. 30, 1916. Patented Nov. 7, 1916. 1,203,667. 5 SHEETS-SHEET 3. … NVvU VV WITNESSES INVENTOR JEchirirv ~Wcil7c&r BY " ATTORNEYSPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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